b) Imposed a tax on documents and printed items such as wills, newspapers, and playing cards. A stamp would be added to prove tax was paid.
c) It happened to directly tax colonists, unlike before where it was indirect, involving duties on imports.
d) The colonists unified to defy the law, and colonial assemblies also said it isn't fair since they aren't represented. NY, Boston and Philadelphia boycotted British goods, and in 1766, the Stamp Act was repealed.